//
// Created by ub on 2020/11/1.
//
#include <iostream>
using namespace std;
void countdown(int n);
/*int main ()
{
   countdown(5);
   return 0;
}*/
void countdown (int n)
{
   cout << "Counting down ..." << n << endl;
   if (n>0)
      countdown(n-1);
   cout << n << " : Kaboom!\n";
}